document optimization in development behavior

www/pages/docs/css-and-images.md

@@ -40,7 +40,7 @@ Styles can be done in any standards compliant way that will work in a browser.
 </html>
 ```
 
-> _In the above example, Greenwood will also bundle any `url` references in your CSS automatically._
+> _In the above example, Greenwood will also bundle any `url` references in your CSS automatically as well as inline any usages of `@import` in your CSS files._
 
 ### Assets